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| author | Tianyu Lan <Tianyu.Lan@microsoft.com> | 2021-10-25 15:21:12 +0300 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-10-28 14:22:49 +0300 |
| commit | 20c89a559e00dfe352b73e867211a669113ae881 (patch) | |
| tree | 502dc12927915b48b4d5321afe4272104c68735b /drivers/hv/hv.c | |
| parent | faff44069ff538ccdfef187c4d7ec83d22dfb3a4 (diff) | |
| download | linux-20c89a559e00dfe352b73e867211a669113ae881.tar.xz | |
x86/hyperv: Add ghcb hvcall support for SNP VM
hyperv provides ghcb hvcall to handle VMBus
HVCALL_SIGNAL_EVENT and HVCALL_POST_MESSAGE
msg in SNP Isolation VM. Add such support.
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Link: https://lore.kernel.org/r/20211025122116.264793-8-ltykernel@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv/hv.c')
| -rw-r--r-- | drivers/hv/hv.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 943392db9e8a..4d6480d57546 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -98,7 +98,13 @@ int hv_post_message(union hv_connection_id connection_id, aligned_msg->payload_size = payload_size; memcpy((void *)aligned_msg->payload, payload, payload_size); - status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL); + if (hv_isolation_type_snp()) + status = hv_ghcb_hypercall(HVCALL_POST_MESSAGE, + (void *)aligned_msg, NULL, + sizeof(*aligned_msg)); + else + status = hv_do_hypercall(HVCALL_POST_MESSAGE, + aligned_msg, NULL); /* Preemption must remain disabled until after the hypercall * so some other thread can't get scheduled onto this cpu and |